DIN 2391-1 cold Drawn or cold rolled steel tube
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DIN 2391-1 cold Drawn or cold rolled steel tube

Date:2019-10-08    View:4020      Tags:DIN 2391-1 cold Drawn or cold rolled steel tube

DIN 2391-1 cold Drawn or cold rolled steel tube is used in hydraulic & pneumatic cylinder, mechanical and Automotive engineering.

Related information for DIN 2391

DIN 2391 standard specifies the Seamless steel tubes used forMechanical and Automobile.

  • for Atuo usd
  • for machinery use
  • Oil cylinder tube
  • Motorcycle shock reducer steel tubes
  • Auto shock reducer inner cylinder
  • GB/T 3639 Cold drawn or cold rolled precision seamless steel tubes
  • GB/T 8713 inside precision seamless tubes for hydraulic pressure and pneumatic services 

Marking:

  • Pipes are supplied with marking according to standard and customer request.
  • Marking is paint on the ends of pipes.
  • The same data, as well as additional information per customer’s request, is indicated on the bundle’s tags.

Delivery:

  • Pipes are supplied in hexagonal bundles or round bundles tied with steel strip.
  • Weight of bundle – up to 5000 kg upon request of customer.
  • Each bundle is furnished with three tags.
Features Specifications
OD(mm)　 Wall Thickness Unit(mm)
2 2.5 3 3.5 4 4.5 5 6 6.5-7 7.5-8 8.5-9 9.5-10 11 12
Φ25-Φ28 ● ● ● ● ● ●
Φ32 ● ● ● ● ● ●
Φ34-Φ36 ● ● ● ● ● ●
Φ38 ● ● ● ● ● ●
Φ40 ● ● ● ● ●
Φ42 ● ● ● ● ●
Φ45 ● ● ● ● ● ●
Φ48-Φ60 ● ● ● ● ● ● ●
Φ63.5 ● ● ● ● ● ● ●
Φ68-Φ73 ● ● ● ● ● ●
Φ76 ● ● ● ● ● ● ● ● ● ●
Φ80 ● ● ● ● ● ● ● ● ● ●
Φ83 ● ● ● ● ● ● ● ● ● ●
Φ89 ● ● ● ● ● ● ● ● ● ●
Φ95 ● ● ● ● ● ● ● ● ● ●
Φ102 ● ● ● ● ● ● ● ● ● ●
Φ108 ● ● ● ● ● ● ● ● ● ●
Φ114 ● ● ● ● ● ● ● ● ●
Φ121 ● ● ● ● ● ● ● ● ●
Φ127 ● ● ● ● ● ● ● ● ●
Φ133 ● ● ● ● ● ● ● ● ●
Φ140 ● ● ● ● ● ● ● ●
Φ146 ● ● ● ● ● ● ● ●
Φ152 ● ● ● ● ● ● ● ●
Φ159 ● ● ● ● ● ● ● ●
Φ168 ● ● ● ● ● ● ● ●
Mechanical Properties(Mpa)
Steel Grade Minimum values for the delivery condition
Steel Name Steel Number BK BKW BKS GBK NBK
Rm A % Rm A % Rm ReH A % Rm A % Rm ReH A %
Mpa Mpa Mpa Mpa Mpa Mpa Mpa
St 30 Si 1.0211 430 8 380 12 380 280 16 280 30 290 to 420 215 30
St 30 Al 1.0212 430 8 380 12 380 280 16 280 30 290 to 420 215 30
St 35 1.0308 480 6 420 10 420 315 14 315 25 340 to 470 235 25
St 45 1.0408 580 5 520 8 520 375 12 390 21 440 to 570 255 21
St 52 1.0580 640 4 580 7 580 420 10 490 22 490 to 630 355 22
Inspection and test list for the DIN 2391 Standard.
Inspection or test types Test frequency
Internal test Acceptance test
Chemical analysis M M
Tensile testing M One per tested batch
Flattening test or extension test M Two per tested batch
Dimension verification M M
Visual inspection M M
NDT in order to identify leaks Individual Individual
Description Name:
  • DIN 2391 Seamless cold drawn tubes
  • DIN 2391 Seamless precision steel tubes
  • ST35 Precision tubes
  • ST45 Precision tubes
  • ST52 Precision tubes
  • Seamless precision tubes
  • DIN 2391 NBK Seamless Precision Steel Tubes
  • DIN 2391 ST35 Seamless precision steel tubes
  • DIN 2391 ST45 Seamless precision steel tubes
  • DIN 2391 ST52 Seamless precision steel tubes
  • ST 52 Honed tubes
  • ST52 cylinder tubes
  • Size: 6mm-350mm.
  • W.T.: 0.8mm-50mm.
  • Shape: Round.

Production type: Cold drawn or cold rolled.

Length: Single random length/ Double random length or as customer’s actual request max length is 10m.

Grade: St30 Si, St30 Al, St35, St45, St52.

Marking

The following marking shall be shown on a label attached to the bundle:

  • the manufacturer’s name or trade mark;
  • the specified dimensions;
  • the number of this European Standard;
  • the steel name or number;
  • the cast number;
  • the delivery condition;

in the case of specific inspection, an identification number (e. g. order or item number) which permits the correlation of the product or delivery unit to the related document.

Note:

  • Mill test certificates will be issued according to EN10204.3
  • The tubes Shall be Seamless cold drawn or cold rolled.
  • The manufacture should have TS16949 certificate.

Protection and Packing:

  • Packed in wooden box or bundles protected with plastic paper, and suitably protected for sea-worthily delivery or as requested.
  • The tubes shall be delivered with a temporary corrosion protection.
  • The type of protection shall be at the discretion of the manufacturer.
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